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Note 10 - Employee Benefits - Non-vested Performance Unit Award Activity (Details) - Performance Shares [Member]
 12 Months Ended
Dec. 31, 2024
$ / shares
shares
Nonvested, shares (in shares) | shares 188,400
Nonvested, weighted average grant date fair value (in dollars per share) | $ / shares $ 19.51
Granted, shares (in shares) | shares 125,464
Granted, weighted average grant date fair value (in dollars per share) | $ / shares $ 17.54
Vested, shares (in shares) | shares (49,162)
Vested, weighted average grant date fair value (in dollars per share) | $ / shares $ 18.34
Forfeited, shares (in shares) | shares (9,148)
Forfeited, weighted average grant date fair value (in dollars per share) | $ / shares $ 20.26
Nonvested, shares (in shares) | shares 255,554
Nonvested, weighted average grant date fair value (in dollars per share) | $ / shares $ 18.77